Dear @t_achmann,
Thank you for your patience. Still, we are working on this, it will take some more days to suggest a solution or fix. Meanwhile, if you want to use touch solution on the 1.4B2 image, please use below workaround.
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn]
"Dll"="BusEnum2.dll"
Change to
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn]
"Dll"="BusEnum.dll"
This is actually disabling a new feature of Asynchronous driver loading.
We will get back in a few days as soon as we find the solution.